def-gdb-thread-buffer-gud-command

def-gdb-thread-buffer-gud-command is a Lisp macro in `gdb-mi.el'.
(def-gdb-thread-buffer-gud-command NAMEGUD-COMMAND &optional DOC)
Define a NAME which will execute GUD-COMMAND with
`gdb-thread-number' locally bound to id of thread on the current
line.